中国胶粘剂

双组分丙烯酸酯结构胶因综合性能优异、适用面广而被广泛应用，但传统产品普遍存在气味大、成本高的问题。为兼顾低气味与高强度，同时降低原料成本，本文以价廉易得的低气味甲基丙烯酸羟乙酯（HEMA）为稀释单体，基于相似相溶原理，自主设计合成了两类可良好溶于HEMA的聚丙烯酸酯弹性体：一类为分子链中无双键的Ⅰ型弹性体，另一类为分子链中引入双键的Ⅱ型弹性体，并分别制备了第一代（FGA）与第二代（SGA）低气味双组分丙烯酸酯结构胶。通过溶解性测试、单因素及正交试验系统考察了弹性体组成、单体种类及配比对胶粘剂性能的影响。结果表明：两类自制弹性体在HEMA中的溶解度均超过50%，显著优于氯丁橡胶、丁腈橡胶及MBS等常规弹性体；FGA胶的拉伸剪切强度最高可达20.40 MPa，与SGA胶（21～23 MPa）基本持平；优化Ⅱ型弹性体与HEMA配比后，SGA胶的拉伸剪切强度进一步提升至23.70 MPa，优于对标参照产品（22 MPa），且气味等级低、原料成本显著降低。研究证实，采用低气味HEMA搭配自制聚丙烯酸酯弹性体，可成功制备出综合性能优异的低气味高强度双组分丙烯酸酯结构胶，为该类产品的低成本化与环保化提供了新思路。

Two-component acrylate structural adhesive is widely used due to its excellent comprehensive properties and broad applicability,but traditional products generally suffer from problems of strong odor and high costs.To achieve both low odor and high strength while reducing raw material costs,low-cost and readily available low-odor 2-hydroxyethyl methacrylate(HEMA) was employed as the diluent monomer in this study,and based on the principle of similar compatibility,two types of polyacrylate elastomers that could dissolve well in HEMA were independently designed and synthesized:one was the Type Ⅰ elastomer without double bonds in the molecular chain,,and the other was the Type Ⅱ elastomer with double bonds introduced into the molecular chain and the first-generation(FGA) and second-generation(SGA) low-odor two-component acrylate structural adhesive were prepared,respectively.Through solubility tests,single-factor experiments,and orthogonal experiments,the effects of elastomer composition,monomer type,and formulation ratio on adhesive properties were systematically investigated.The research results showed that the solubility of both types of self-made elastomers in HEMA exceeded 50%,which was significantly superior to conventional elastomers such as polychloroprene rubber,nitrile rubber,and MBS.The tensile shear strength of FGA adhesive reached up to 20.40 MPa,which was basically equivalent to that of SGA adhesive(21-23 MPa).After optimizing the ratio of Type Ⅱ elastomer to HEMA,the tensile shear strength of SGA adhesive was further improved to 23.70 MPa,which was superior to the benchmarking reference product(22 MPa),and the odor level was low with significantly reduced raw material costs.This study confirmed that the use of low-odor HEMA combined with self-made polyacrylate elastomers could successfully prepare low-odor high-strength two-component acrylate structural adhesive with excellent comprehensive properties,providing new ideas for the low-cost and environmentally friendly development of such products.